Restricting number of rows in Datalist

In my asp.net I am using Datalist in that I want to limit row count and want the sort to be in vertical. Let me know how to do 开发者_如何学Gothis. Ex: I want my list to be like this

1  4
2  5
3  6

for your first issue, restricting to number of rows is, just pass the required data to datalist and for vertical , use this property RepeatDirection="Vertical"